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youtube-dl
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Merge pull request #353 from FiloSottile/avconv 

check for avconv and ffmpeg, use as available; closes #344
master
Filippo Valsorda 12 years ago
parent
a047951477 505ed3088f
commit
17f3c40a31
3 changed files with 32 additions and 25 deletions
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  1. 5
      README.md
  2. 48
      youtube_dl/PostProcessor.py
  3. 4
      youtube_dl/__init__.py

5
README.md
View File

@ -87,10 +87,11 @@ which means you can modify it, redistribute it or use it however you like.
### Post-processing Options:
--extract-audio convert video files to audio-only files (requires
ffmpeg and ffprobe)
ffmpeg or avconv and ffprobe or avprobe)
--audio-format FORMAT "best", "aac", "vorbis", "mp3", "m4a", or "wav";
best by default
--audio-quality QUALITY ffmpeg audio bitrate specification, 128k by default
--audio-quality QUALITY ffmpeg/avconv audio bitrate specification, 128k by
default
-k, --keep-video keeps the video file on disk after the post-
processing; the video is erased by default

48
youtube_dl/PostProcessor.py
View File

@ -60,7 +60,6 @@ class AudioConversionError(BaseException):
self.message = message
class FFmpegExtractAudioPP(PostProcessor):
def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, keepvideo=False):
PostProcessor.__init__(self, downloader)
if preferredcodec is None:
@ -68,11 +67,22 @@ class FFmpegExtractAudioPP(PostProcessor):
self._preferredcodec = preferredcodec
self._preferredquality = preferredquality
self._keepvideo = keepvideo
self._exes = self.detect_executables()
@staticmethod
def get_audio_codec(path):
def detect_executables():
available = {'avprobe' : False, 'avconv' : False, 'ffmpeg' : False, 'ffprobe' : False}
for path in os.environ["PATH"].split(os.pathsep):
for program in available.keys():
exe_file = os.path.join(path, program)
if os.path.isfile(exe_file) and os.access(exe_file, os.X_OK):
available[program] = exe_file
return available
def get_audio_codec(self, path):
if not self._exes['ffprobe'] and not self._exes['avprobe']: return None
try:
cmd = ['ffprobe', '-show_streams', '--', encodeFilename(path)]
cmd = [self._exes['avprobe'] or self._exes['ffprobe'], '-show_streams', '--', encodeFilename(path)]
handle = subprocess.Popen(cmd, stderr=file(os.path.devnull, 'w'), stdout=subprocess.PIPE)
output = handle.communicate()[0]
if handle.wait() != 0:
@ -87,22 +97,18 @@ class FFmpegExtractAudioPP(PostProcessor):
return audio_codec
return None
@staticmethod
def run_ffmpeg(path, out_path, codec, more_opts):
def run_ffmpeg(self, path, out_path, codec, more_opts):
if not self._exes['ffmpeg'] and not self._exes['avconv']:
raise AudioConversionError('ffmpeg or avconv not found. Please install one.')
if codec is None:
acodec_opts = []
else:
acodec_opts = ['-acodec', codec]
cmd = ['ffmpeg', '-y', '-i', encodeFilename(path), '-vn'] + acodec_opts + more_opts + ['--', encodeFilename(out_path)]
try:
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout,stderr = p.communicate()
except (IOError, OSError):
e = sys.exc_info()[1]
if isinstance(e, OSError) and e.errno == 2:
raise AudioConversionError('ffmpeg not found. Please install ffmpeg.')
else:
raise e
cmd = ([self._exes['avconv'] or self._exes['ffmpeg'], '-y', '-i', encodeFilename(path), '-vn']
+ acodec_opts + more_opts +
['--', encodeFilename(out_path)])
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout,stderr = p.communicate()
if p.returncode != 0:
msg = stderr.strip().split('\n')[-1]
raise AudioConversionError(msg)
@ -121,7 +127,7 @@ class FFmpegExtractAudioPP(PostProcessor):
# Lossless, but in another container
acodec = 'copy'
extension = self._preferredcodec
more_opts = ['-absf', 'aac_adtstoasc']
more_opts = [self._exes['avconv'] and '-bsf:a' or '-absf', 'aac_adtstoasc']
elif filecodec in ['aac', 'mp3', 'vorbis']:
# Lossless if possible
acodec = 'copy'
@ -136,18 +142,18 @@ class FFmpegExtractAudioPP(PostProcessor):
extension = 'mp3'
more_opts = []
if self._preferredquality is not None:
more_opts += ['-ab', self._preferredquality]
more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality]
else:
# We convert the audio (lossy)
acodec = {'mp3': 'libmp3lame', 'aac': 'aac', 'm4a': 'aac', 'vorbis': 'libvorbis', 'wav': None}[self._preferredcodec]
extension = self._preferredcodec
more_opts = []
if self._preferredquality is not None:
more_opts += ['-ab', self._preferredquality]
more_opts += [self._exes['avconv'] and '-b:a' or '-ab', self._preferredquality]
if self._preferredcodec == 'aac':
more_opts += ['-f', 'adts']
if self._preferredcodec == 'm4a':
more_opts += ['-absf', 'aac_adtstoasc']
more_opts += [self._exes['avconv'] and '-bsf:a' or '-absf', 'aac_adtstoasc']
if self._preferredcodec == 'vorbis':
extension = 'ogg'
if self._preferredcodec == 'wav':
@ -156,7 +162,7 @@ class FFmpegExtractAudioPP(PostProcessor):
prefix, sep, ext = path.rpartition(u'.') # not os.path.splitext, since the latter does not work on unicode in all setups
new_path = prefix + sep + extension
self._downloader.to_screen(u'[ffmpeg] Destination: ' + new_path)
self._downloader.to_screen(u'[' + self._exes['avconv'] and 'avconv' or 'ffmpeg' + '] Destination: ' + new_path)
try:
self.run_ffmpeg(path, new_path, acodec, more_opts)
except:
@ -164,7 +170,7 @@ class FFmpegExtractAudioPP(PostProcessor):
if isinstance(e, AudioConversionError):
self._downloader.to_stderr(u'ERROR: audio conversion failed: ' + e.message)
else:
self._downloader.to_stderr(u'ERROR: error running ffmpeg')
self._downloader.to_stderr(u'ERROR: error running ' + self._exes['avconv'] and 'avconv' or 'ffmpeg')
return None
# Try to update the date time for extracted audio file.

4
youtube_dl/__init__.py
View File

@ -293,11 +293,11 @@ def parseOpts():
postproc.add_option('--extract-audio', action='store_true', dest='extractaudio', default=False,
help='convert video files to audio-only files (requires ffmpeg and ffprobe)')
help='convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)')
postproc.add_option('--audio-format', metavar='FORMAT', dest='audioformat', default='best',
help='"best", "aac", "vorbis", "mp3", "m4a", or "wav"; best by default')
postproc.add_option('--audio-quality', metavar='QUALITY', dest='audioquality', default='128K',
help='ffmpeg audio bitrate specification, 128k by default')
help='ffmpeg/avconv audio bitrate specification, 128k by default')
postproc.add_option('-k', '--keep-video', action='store_true', dest='keepvideo', default=False,
help='keeps the video file on disk after the post-processing; the video is erased by default')

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